Definitions for "Dungeon Master"
The DM portrays nonplayer characters, makes up the story setting for the other players, and serves as a referee.
( DM, or GM, or Game Master): The referee who creates the dungeon, provides the setting for the game, and handles all monsters encountered. (D&D 1)
The original term for the player who 'directs' the game. Another word for Games Master, Storyteller, Keeper, Director etc.
a board editor for the Underworld, second in command to the Lord High Executioner and the Chief Poisoner